Port 25 for single sender

Maintenance
1

Hello, I have a monitoring service on my home automation system that only accepts connecting to smtp port 25 for sending email.

Is there a way to open this port just for the single IP address where the monitoring service is running?

Thanks,

Paulo Matos

2

It’s possible, however any configuration files you change to make this work will be rewrote once you next upgrade mail-in-a-box. I wouldn’t advise adjusting anything.